16 years later it still runs but

[don justham]

My 1970 Corvette w/350 sat for 16 years. Thanks to some great help from this group,the use of Marvel Mystery oil in all the cylinders and the removal of 33 years of grease and dirt it fired up this weekend. Ran a compression test on all cylinders and got from 140-190. I think that is pretty good because none of the numbers was low. Are these number okay or do I need to do something else to it>? Thanks
]

[Patrick H.]

Re: 16 years later it still runs but

Don,

Yes. You must drive it.

Seriously, if you've fixed and sorted out all the other issues then start driving it. Try short distances first and listen for unusual bangs and groans. If it works, keep going farther each time.

Good luck!

Patrick

[Joe L.]

Re: 16 years later it still runs but

Don-----

The compression numbers sound ok. Always keep in mind that the "popper" type compression tests are not the most accurate way to check and engine's condition and these tests are subject to many "vagaries". They were outlawed by the FAA for aircraft reciprocating engine tests many years ago and replaced by the cylinder leak-down test. The cylinder leak-down test can also be used for cars, but is more difficult to perform and requires more equipment. For a "popper" test, I think that your 140-190 range is ok.

[Christopher R.]

Re: 16 years later it still runs but

You got it to go, now make sure it'll stop. I'd drive it as much as possible, close to home, with a cell phone and the gold AAA membership, and as slowly as possible. Make sure the emergency brake is adjusted.

33 year old car sat for the past 16 years. I'd be afraid of all the rubber parts, especailly those in the brake system - caliper seals, and master cylinder seals. Also check the gas tank for crud and water. I assume you've changed the tires and all the fluids, including the brake fluid.

When you're assured it'll stop, you can then drive it more aggressively in an attempt to subject the rest of the car to some stress. You want to see if other stuff is going to break. You just don't want your brakes to break.